* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

li {
    list-style: none
}

.clearfix:after {
    visibility: hidden;
    clear: both;
    display: block;
    content: ".";
    height: 0
}

a {
    color: #666;
    text-decoration: none
}

button,
input {
    border: 0;
    outline: none;
}